Title :
Scattering from conducting open cavities by generalized ray expansion (GRE)
Author :
Garcia-Pino, Antonio ; Obelleiro, Fernando ; Rodriguez, J.L.
Author_Institution :
E.T.S.I. Telecomm., Campus Univ., Vigo, Spain
fDate :
7/1/1993 12:00:00 AM
Abstract :
The problem of electromagnetic scattering by metallic open cavities is addressed here using a generalized ray expansion (GRE) method. The wave coupled into the cavity is modeled as a combination of a number of spherical waves, the propagation of such waves being described in terms of geometrical optics. A brief description of the method including some details about aperture discretization as well as results for three-dimensional problems such as circular and rectangular cross-section cavities are presented. The GRE method gives results that agree well with those of modal analysis and allow, like ray methods, for greater flexibility in geometric modeling. Furthermore, the ray-tracing process must be done only once for different incident waves, so its computational cost is lower than that of the classic ray methods, where the incoming wave is described as a different bundle of parallel rays for each direction of incidence
Keywords :
cavity resonators; electromagnetic wave scattering; ray tracing; GRE method; aperture discretization; circular cross-section cavities; conducting open cavities; electromagnetic scattering; generalized ray expansion; geometrical optics; metallic open cavities; ray-tracing process; rectangular cross-section cavities; spherical waves; three-dimensional problems; Apertures; Electromagnetic propagation; Electromagnetic scattering; Geometrical optics; Modal analysis; Optical coupling; Optical propagation; Optical scattering; Ray tracing; Solid modeling;
Journal_Title :
Antennas and Propagation, IEEE Transactions on